Sanchez-Mejia Rene O, Limbo Mary, Tihan Tarik, Galvez Michael G, Woodward Meredith V, Gupta Nalin
Department of Neurological Surgery, University of California, San Francisco 94143, USA.
J Neurosurg. 2006 Oct;105(4 Suppl):311-4. doi: 10.3171/ped.2006.105.4.311.
Intracranial dermoid cysts are rare congenital lesions that result from abnormal sequestration of ectodermal cells during neural tube formation. Dermoid cysts are typically hypodense on computed tomography, but when hyperdense may mimic a hemorrhage. The authors report the case of a 16-year-old boy who presented with a history of chronic progressive headaches. Findings on a CT scan were indicative of hemorrhage. Magnetic resonance imaging revealed the lesion to be a dermoid cyst with unusual characteristics. Upon gross resection, the lesion appeared to be a dermoid cyst without hemorrhage, but histological evaluation revealed evidence of hemorrhage. The authors describe their experience and review the literature, emphasizing that a dermoid cyst may have unusual radiographic characteristics indicative of hemorrhage and may contain areas of hemorrhage on histological examination.
颅内皮样囊肿是罕见的先天性病变，由神经管形成过程中外胚层细胞异常隔离所致。皮样囊肿在计算机断层扫描上通常呈低密度，但高密度时可能类似出血。作者报告了一名16岁男孩的病例，该男孩有慢性进行性头痛病史。CT扫描结果提示出血。磁共振成像显示该病变为具有不寻常特征的皮样囊肿。大体切除时，病变似乎是一个无出血的皮样囊肿，但组织学评估显示有出血迹象。作者描述了他们的经验并回顾了文献，强调皮样囊肿可能具有提示出血的不寻常影像学特征，并且在组织学检查中可能包含出血区域。
